Bayer Advantage II Dog 11-20 lb 6pk

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Once a month topical flea treatment for dogs between 11-20 lbs, now with the insect growth regulator (IGR) pyriproxyfen, which inhibits the development of flea eggs and kills flea larvae. Kills fleas within 12 hours of application. Prevents reinfestation for up to 4 weeks. Convenient, easy to apply. 6-Month Supply.